#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <assert.h>
int my_strlen(char* first)
{
	assert(first != NULL);
	int count = 0;
	while (*first != '\0')//while (*first)
	{
		count++;
		first++;
	}
	return count;
}
int main01()
{
	char arr[] = "zhuzhudebaobei";
	int len = my_strlen(arr);
	printf("%d\n", len);
	return 0;
}